package com.kwan.xframe.util;

import android.content.Context;
import android.os.Environment;

import java.io.File;
import java.math.BigDecimal;

/**
 * Created by Administrator on 2017/9/8.
 */

public class CacheDataManager {

    public static String getTotalCacheSize(Context context) throws Exception {

        long cacheSize = getFolderSize(context.getCacheDir());
        if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))
            cacheSize += getFolderSize(context.getExternalCacheDir());
        else
            cacheSize += getFolderSize(context.getCacheDir());

        return getFormatSize(cacheSize);
    }

    public static void clearAllCache(Context context) {

        deleteDir(context.getCacheDir());
        if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))
            deleteDir(context.getExternalCacheDir());
        else
            deleteDir(context.getCacheDir());
    }

    private static boolean deleteDir(File dir) {

        if (dir != null && dir.isDirectory()) {
            String[] children = dir.list();
			for (String aChildren : children) {
				boolean success = deleteDir(new File(dir, aChildren));
				if (!success)
					return false;
			}
        }
        return dir.delete();
    }

    // 获取文件
    // Context.getExternalFilesDir() --> SDCard/Android/data/你的应用的包名/files/
    // 目录，一般放一些长时间保存的数据
    // Context.getExternalCacheDir() -->
    // SDCard/Android/data/你的应用包名/cache/目录，一般存放临时缓存数据

    public static long getFolderSize(File file) throws Exception {

        long size = 0;
        try {
            File[] fileList = file.listFiles();
			for (File aFileList : fileList) {
				// 如果下面还有文件
				if (aFileList.isDirectory()) {
					size = size + getFolderSize(aFileList);
				} else {
					size = size + aFileList.length();
				}
			}
        } catch (Exception e) {
            e.printStackTrace();
        }

        return size;

    }

    /**
     * 格式化单位
     *
     * @param size
     */

    public static String getFormatSize(double size) {

        double kiloByte = size / 1024;
        if (kiloByte < 1) {
            return size + "M";
        }
        double megaByte = kiloByte / 1024;
        if (megaByte < 1) {
            BigDecimal result1 = new BigDecimal(Double.toString(kiloByte));
            return result1.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "KB";
        }

        double gigaByte = megaByte / 1024;
        if (gigaByte < 1) {
            BigDecimal result2 = new BigDecimal(Double.toString(megaByte));
            return result2.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "MB";
        }

        double teraBytes = gigaByte / 1024;

        if (teraBytes < 1) {
            BigDecimal result3 = new BigDecimal(Double.toString(gigaByte));
            return result3.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "GB";
        }
        BigDecimal result4 = new BigDecimal(teraBytes);
        return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "TB";

    }

}
